InChI=1S/C16H12O10S/c1-24-11-4-7(17)5-12-13(11)14(19)9(6-25-12)8-2-3-10(18)16(15(8)20)26-27(21,22)23/h2-6,17-18,20H,1H3,(H,21,22,23)